TDA7563APD datasheet(14/35 Pages) STMICROELECTRONICS

14 / 35 page

Diagnostics functional description

TDA7563A

14/35

Figure 20.

SVR and output behavior (case 1: without turn-on diagnostic)

Figure 21.

SVR and output pin behavior (case 2: with turn-on diagnostic)

The information related to the outputs status is read and memorized at the end of the

current pulse top. The acquisition time is 100 ms (typ.). No audible noise is generated in the

process. As for SHORT TO GND / VS the fault-detection thresholds remain unchanged from

26 dB to 12 dB gain setting. They are as follows:TDA7563A

Figure 22.

Thresholds for short to GND/VS

Bias (power amp turn-on)

Diagnostic Enable

(Permanent)

Permanent diagnostic

acquisition time (100mS Typ)

Permanent Diagnostics data (output)

permitted time

I2CB DATA

Vsvr

Out

FAULT

event

Read Data

Bias (power amp turn-on)

permitted time

Turn-on diagnostic

acquisition time (100mS Typ)

Read Data

Permanent diagnostic

acquisition time (100mS Typ)

Permanent Diagnostics data (output)

permitted time

Diagnostic Enable

(Turn-on)

Turn-on Diagnostics data (output)

permitted time

I2CB DATA

Vsvr

Out

Diagnostic Enable

(Permanent)

FAULT

event

D01AU1253

S.C. to GND

S.C. to Vs

1.8V

VS-1.8V

Normal Operation

1.2V

VS-1.2V

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